private void ParseStateProperty(StateNode stateNode)
{
var stateNameIdentifier = (IdentifierToken) Eat(TokenType.Identifier);
var stateName = stateNameIdentifier.Identifier;
var propertyInfo = typeof(StateNode).GetProperty(stateName);
if (propertyInfo == null)
ReportError("Unrecognized identifier: {0}", stateNameIdentifier, stateName);
Eat(TokenType.Equal);
var propertyType = propertyInfo.PropertyType;
var underlyingType = Nullable.GetUnderlyingType(propertyType);
object value = null;
switch (PeekType())
{
case TokenType.Identifier:
if (!underlyingType.IsEnum)
ReportError("Invalid value for {0}.", stateName);
var stateValueIdentifier = (IdentifierToken) Eat(TokenType.Identifier);
var stateValue = stateValueIdentifier.Identifier;
if (!underlyingType.GetEnumNames().Contains(stateValue))
ReportError("Unexpected value: {0}", stateValueIdentifier, stateValue);
value = Enum.Parse(underlyingType, stateValue);
break;
case TokenType.Literal:
if (underlyingType != typeof(float))
ReportError("Invalid value for {0}.", stateName);
value = ((FloatToken) Eat(TokenType.Literal)).Value;
break;
case TokenType.True:
if (underlyingType != typeof(bool))
ReportError("Invalid value for {0}.", stateName);
Eat(TokenType.True);
value = true;
break;
case TokenType.False:
if (underlyingType != typeof(bool))
ReportError("Invalid value for {0}.", stateName);
Eat(TokenType.False);
value = false;
break;
default:
ReportError("Unexpected value for {0}.", stateName);
break;
}
propertyInfo.SetValue(stateNode, value, null);
Eat(TokenType.Semicolon);
}
private StateNode ParseState()
{
var result = new StateNode();
Eat(TokenType.State);
Eat(TokenType.OpenCurly);
while (PeekType() != TokenType.CloseCurly)
ParseStateProperty(result);
Eat(TokenType.CloseCurly);
return result;
}